Improvement in key-hole guards



@tutti @time JOHN L. RUSSELL, OF

PRAIRIE CITY, IOWA.

Letters Patent No. 99,005, dated January 18, 1870.

IMPROVEMENT IN KEY-HOLE GUARDS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that I, J ons L. RUSSELL, of Prairie City, in the county ofJasper, and State of Iowa, have invented a new and useful Improvement inKey-Hole Guards; and I do hereby declare that the following is a tull,clear, and exact`description thereof, which will enable others skilledin the art to make and use the same, reference being had to theaccompanying drawings, forming part of this specification.

The object of this invention is to provide a safe and efficient meansfor protecting door-locks from the depredations of thieves and burglars;and

It consists in arranging a sliding guard for covering the key-hole, andalso a catch for holding the key-hole guard in place, both slide andcatch being reversible, so that the slide may be used on either side ofthe lock, as will be hereinafter more fully described.

` In the accompanying drawingvided with my sliding guards and catch.

Figure 2 is a, view of the guard detached from the lock.

Similar letters -of reference indicate corresponding parts.

A is the lock.

B represents the key-hole.

C iS the sliding reversible guard.

D is the reversible sliding catch.

On each side of the lock, a recess, E, is made, en-

closing the key-hole,`sufciently deep to receive the full thickness ofthe guard C.

Across the edge of the l'ock, from one of the recesses E to the other,another recess or channel is made for receiving the sliding catch D. Theedges of this catch are dovetailing, and the recess is made to match, asindicated by the dotted lines in fig. 1.

F F represent cavities in the side of the guard,

intowhich the end or point of the catch enters, for holding the guard inplace. F holds the guard over the key-hole, and F holds it in its recesswhen it is drawn back and not in use.

This guard is designed for all locks placed on the inside of doors, as aprotection to inmates of dwellings and rooms.

The guard is shoved in between the door and the lock, and may be used oneither the right or left-hand edge of the door, according as thelock maybe placed. The catch D may be used from either side of the lock,

f so as to adapt it to the guard in either position. Figure 1 representsa perspective view of a lock pro- This is an extremely cheap and simplemethod of preventing door-locks from being picked or tampered with fromthe outside.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patentv Combining areversible guard, C, and a reversible catch, D, so that the slide may beused on either side of the lock, in the mannen described.

JOHN L.' RUSSELL.

Witnesses:

M. B. MCKEEVER, D. G. WINcHnLL.

